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Open Access Research article

Comparison of two Bayesian methods to detect mode effects between paper-based and computerized adaptive assessments: a preliminary Monte Carlo study

Barth B Riley1* and Adam C Carle2

  • * Corresponding author: Barth B Riley barthr@uic.edu

  • † Equal contributors

Author Affiliations

1 Department of Health Systems Science, M/C 802, College of Nursing, University of Illinois at Chicago, 845 S. Damen Ave., Chicago, IL 60612, USA

2 University of Cincinnati School of Medicine, Cincinnati Children's Hospital Medical Center, 3333 Burnet Avenue, MLC 7014, Cincinnati, OH 45229, USA

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BMC Medical Research Methodology 2012, 12:124  doi:10.1186/1471-2288-12-124

Published: 17 August 2012

Additional files

Additional file 1:

Appendix A. Generating and Estimated Item Parameters for the Two Simulated Item Banks (Validation data) Based on the One-and Two-Parameter IRT Models, Respectively. 1PL = one-parameter item response model; 2PL = two-parameter item response model; α = simulated discrimination parameter; β = simulated difficulty parameter; = estimated discrimination parameter; <a onClick="popup('http://www.biomedcentral.com/1471-2288/12/124/mathml/M3','MathML',630,470);return false;" target="_blank" href="http://www.biomedcentral.com/1471-2288/12/124/mathml/M3">View MathML</a>= estimated difficulty parameter.

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Additional file 2:

Sample File of Simulee Measures Used to Generate CAT Item Responses. A 1 column x 3000 row of generated θ values used to generate item responses for subsequent use in CAT simulation.

Format: XLS Size: 131KB Download file

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Additional file 3:

Sample P&P and CAT Item Parameters. This file contains 4 columns of item parameters for 100 items. Columns 1 and 2 are the estimated discrimination and difficulty parameters for the P&P version of the instrument, respectively. Columns 3 and 4 are the discrimination and difficulty parameters used to generate the item responses for subsequent use in the CAT simulation.

Format: XLS Size: 22KB Download file

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Additional file 4:

Sample Item Response File Used in CAT Simulation. A 100 column by 3000 row spreadsheet containing generated item responses according to the CAT person and item parameters described above. A 1 indicates a "no" response and 2 a "yes" response.

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Additional file 5:

Appendix B. WinBUGS Code.

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